Everything Microsoft changed in the first four Windows 10 Redstone 4 preview builds

Here are all the changes Microsoft has introduced in the first four previews of the Windows 10 Redstone 4 update due in 2018.
Although the Windows 10 Fall Creators Update is now ready for the masses, it doesn't mean that the development has concluded. In fact, Microsoft has already started working on the next version, which we currently know as the "Redstone 4 update." Recently, the company released Windows 10 build 17017 for PC to testers with a number of improvements and a few new features.
Windows 10 build 17017 is the first test preview that became available through the Fast ring. Thus far there have been four previews in total, but the first three were made available using the "Skip Ahead" option.
In the latest build, Windows 10 brings Cortana Collection that allows the assistant to automatically group items in easy to access lists. The Settings app gains new features and changes, such as a new page to manage apps at startup, and more.